Pump



Pafented 6,1920.

G. A. HUMA SON.

PUMP. APPLICATION FILED OCT. 5. 9H3.

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G. A. HUMASON."

PUMP.

APPLICATION FILED OCT. 5, 1918.

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' GRANVILLE. A. HUMASON INVENTOP y ATTORNE) I UNITED STATES "PATENT. OFFICE.

GRANVILLE ALLISON HUMASON, OF HOUSTON, TEXAS, ASSIGNOR OF ONE-HALF TO JOHN PARKER, HOUSTON, TEXAS.

PUMP.

Y residing at Houston',-Harris county, Texas, and usefulhave invented a certain new Improvementin-Pur'nps, of WhlCh the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same. a

My invention relates to an lmprovement infpumps and has special application to pumps for use in deep wells, such as 011 or water wells. This invention is an mprovement on the pump shown and described in my co-pending application Serial No. 241,- 778 filed June25, 1918. I

An object of my present invention is to provide a porn which will be strong and dependable an easy of operation. I 7

Another object is to provide means for easily adjustin and securing my pump within the wel when it is first introduced therein. o

Another object is to provide a specially constructed piston for which will be capable of a powerful workin stroke and which will secure at all times a ull volume of liquid at each stroke of the pumping rod.

Other objects and advantages will be obvious from the specification which follows and will be brou ht out with; greater particularity in the c aims.

With reference to the drawings forming a part of this specification, Figure 1 is a central longitudinal section taken on the line 1-1 of Fig. 13. Fig. section of the plston used in my 'lmproyed pump taken at right angles to the view shown in Fig. 1. Fig. dis a transverse section on the line 3-3 of Fig. 6. Fig. 4 is a central longitudinal section of the lower end of my pump illustrating 'the l ocklng device by means of which the pump 18 secured in the well. Figs. 5 and 6 are broken detail views showing with greater clearness the locking device illustrated in Fig fl. Fig. 7 is a transverse section on the line 7,-7 of Fig. 6. Fig. 8 is a lon itudinal section of the piston and working arrelof my pump similar to that shown in Fig. 1 andillustrating the piston in its lowest position-:' Figs. 9 and 10 are detail views showing the parts illustrated in Fig. 8 somea deep well pump 1 2 is a m'milar Patented July 6, 1920.

Application filed October 5, 1918. Serial No. 256,988.

what enlarged. Fig. 11 is a transverse'section on the line 1111 of Fig. 9. Fig. 12 is a similar section on the line 12-12 of,

Fig. 9 and Fig. 13 is a transverse section on the line 1313 of Fig. 10. i

In the several views illustrating my invention like characters of reference are used to designate like'parts throughout the several views. I have shown my pump as mounted within an .outer casing 14. The hollow pump rod 15 extends from'the pump latform, not shown, down through the casing 1n the well to a point somewhat above the level of the liquld to be pumped. It

has on the lower section thereof, an enlarged head 16. The lower face of the head 16 is provided with a conical recess 17 in which an upper nipple 18 upon-the piston head 21 is adapted to fit. A coupling ring 19 having an upper inwardly projecting annular flange 20 fitting over the upper end of the head 16 is extended downwardly for threaded attachment to the upper end of the 7 piston head 21. By the use of this coupling means it will beapparent that the tighten ing of the coupling ring 19 will serve to draw the lower piston head and the nipple 18 into close and rigid contact with the head 16 of the pump rod. I

The piston head21 is a cylindrical castinghaving on opposite sides thereof small recesses 22, serving to house rotatable nonfriction rollers 23, which are adapted to bear uponthe sides of the casing, thereby holding the piston head evenly withinthe casing and against sliding friction therewith. The rollers 23 are mounted to rotate on the inner ends of pins 23 the outer ends. of which are threaded into the side ,of the head on a line at right angles to the plane of the recesses 22 in which said rollers are housed. .The piston head 21 has a'cen- 'tral longitudinal fluid passage 24, extending'therethrough, said passage terminating in two branching passages" 25 at the lower end of said head. At the upper end of the piston head 21 and within the channel 24 I have provided a valve chamber26. This chamber is threaded into the upper end of the passage 24 and contains therein an upwardly opening valve 27 having a valve stem 28 around which a spiral spring 2? acts to hold the said .valve in its seat by are adapted to reciprocate withinfour cylinders formed within a casting 32 at the upperend of a valve chamber The pistons -30 are larger in diameter than the pistons 3131 and are formed at the lower end of hollow piston rods 34 which are threaded into the two. branching channels 25 in the lower end of the piston head 21. The rods 34 are provided adjacent the lower I end with piston rings 35 adapted to maintain a close fit with the piston chambers in which .they reciprocate. At the lower end of the saidhollow piston rods 34 are valve chambers 36 in which are positioned up-.

wardly opening valves 37 similar in construction to the valve 27 previously described. i

The two pistons 3131 shown particu-, larly in Fig. 2 are solid rods threaded into recesses in the lower end of the piston head 21. The lower end of said rods 31 are adapted to make a fluid tight contact with the chamber in-which they reciprocate by means of piston rings 38 in an ordinary manner. I

As shown particularly in Figs. 1 and 2, thecasting 32 is integral with an upward extension ofa pipe 33 which is reduced in diameter below the piston chamber and is provided with an upwardly opening valve 40. The -lower end of the pipe 33 is threaded exteriorly. to provide attachment for a ring 41. The inner portion of the pipe 33 is provided with a tapered recess to receive a nipple 42 upon the upper end of the locking means 43. A coupling ring 41, having a flange engaged over the upper end of the ring 41, is extended downwardly and threaded over the upper end of the locking member 43 to provide an at 'taching means similar to that connecting the pump rod with the piston head as previously described.

r The means by which my pump is secured within the well. in a detachable manner will nowbe described. The member 43 atv tached to the lower end of the pipe 33, as

a coarse tapered thread as vshown at 44 in Figs. 4 and 5. This threaded portion is tapered downwardly and terminates in a central cylindrical portion 45 enlarged to approximately the full diameter of the casing. This enlarged portion 45 is recessed at the upper and lower ends thereof at 46 and 47 respectively to receive a clamping means serving the purpose of locking the device in the well. Below the enlarged portion 45 the tubular member 43 is threaded exteriorly with a coarse left hand thread tapering outwardly toward the lower end, the reverse of the threaded portion 44,. this threaded portion 44 terminates above a cylindrical seat 48, for the lower end of the clamping means and for the accommodation of a system of packing rings which will be presently described. Below this seat 48 the member 43 terminates in a threaded shank 49 for attachment to the upper end of a well strainer 50, or other pipe Within the well. The clamping means used in my device is adapted to be threaded upon the pipe 43 so as to engage the two threaded portions 44 and 44'. Said clamping means 51 is composed of four sector shaped portions 52 each of which members comprise about 90 of the circle surrounding the threaded portion 44, 44'. These members 52 may, if desired, be held in engagement with the threads 44 by means of leaf springs 53 seated within longitudinal recesses 53 in the sides of each of the sectors as'shown in Fig. 6. These springs are, however, not es sential. The outer periphery of each of the members 52 is provided with teeth 55 for engagement with the inside of the casing. The members 52 are slightly wedge shaped in longitudinal section; With the clamping members arranged at the smaller end of the tapered portion of the pipe'43, the teeth will be out of engagement with the" side of the casing. \Vhen, however, the pipe 43 is rotated in a right hand direction, the clamping members 44 on the upper taperedportion will be drawn upwardly by their threaded contact with the. said pipe and as the lower portion of the clamping means 44 are somewhat thicker than the upper portion thereof the jaws will hence be forced outwardlyinto contact with the sides of the casing which will thereby be firmly gripped by the toothed jaws. The thread upon the lower portion of the pipe 43 is threaded with a left hand thread. The upper portion of the lower clamping members 52 is thicker than the lower portion thereof and. as the pipe 43 is rotated. the clamping membars 52 will be forced downwardly and outwardly in the same manner as the clamping jaws upon the threaded portion 44. thereby also engaging in a rigid manner the outer casing of the well. As the lower jaws 52 are forced downwardly they engage the packing rings 54 and 55 in such manner as to compress them forcibly between the retaining washers 56, onthe upper packing ring, or 57 on the lower packing ring, and the material of the pipe beneath them so as to force them laterally into water tight'con-i tact with the sides of the casing and with the walls of the chambers in which they are located respectively.

In the operation of my invention the pump with the locking means on the lower end thereof is inserted into the well and lowered to a point, closely adjacent the strainer which has been previously set in the well. The pump rod and pump is then given a few turns in a right hand direct-ion to force the clamping jaws outwardly into rigid engagement with the casing. This prevents lateral vibration of the device when the pump is operating.

The pump is then operated. The reciprocation of the pump rod from the surface is accomplished by the usual means now in use. The upper stroke of the pump rod 15 will raise the piston head 21 and with it the four pistons 30-30 and 31-31 to about the position shown in Fig. 1. This upward stroke will seat the valves 37 in the hollow piston rods 30 thereby causing an upward suction of a current of fluid within the piston chamber 33. This upward suction will open the valve 40 in the lower part of the chamber, allowing the passage of liquid upwardly following the piston. On the downward stroke of the piston head the four pistons will be driven downwardly within their chamber and the valve 40 will be closed immediately, thereby forcing the oil in the chamber 18 upwardly past the valves 37 in the hollow piston rods 30-30, into the passage 24 and past the valve 27 to the hollow upwardly extending pump rod. As the solid piston rods 31--3l offer no upward passage for the oil therethrough the downward stroke of these pistons will serve to compress the liquid within the piston chamber 33 thereby forcing it more strongly upward through the hollow piston ro ds 30-30 against the force of the head of liquid which is standing within the well. This is an important feature of my pump and serves to cause afull volume of liquid to be forced upwardly within the outlet pipe in the pump rod at each downward stroke of the piston. It is apparent that the pump would be fully operative without the two pistons 3l-3l, but the addition of these two supplementary pistons, acting in the manner described, will act, on the upward stroke, to draw into the four chambers occupiedby the pistons a certain large supply of liquid. That which fills the chamber below the two pistons 3030, will of course. find a passage upwardly past the valves in the piston rods 34. But in addition to the oil contained in the chamber occupied by these two pistons the pumpmg.

amount of oil which fills the chambers occupied by the pistons 3l-I-ll will be forced upwardly past the valves in the piston rod ill and thus serve to fill up the pump rod in the same manner. The volume of liquid forced upwardly is not twice as great as though the pistons ill-31 were not used because the two pistons 3l-31 are somewhat smaller,v than the pistons 30-30. The volume is however. greatly increased and the force exerted to deliver the liquid upwardly from the well is also increased. thereby making a most efiicient device for deep well I have shown a valve 27 in the upper end of the piston head and it is contemplated that similar valves shall be placed at convenient intervals in the pump rod to assist in sustaining the head of liquid which fills the pump rod at all times during the working of my device.

The advantages of this pump will be obvious. The difiiculty which is often encountered 'in deep well pumping of effecting a constant and equal flow of liquid from the well,'will be entirely overcome by a pump of this construction. it being obvious that the engagement of the pistons within thev piston chambers will be such that a volume of oil will be drawn into the piston chambers more than is sufficient to fill the two outlet piston rods 34 and that the downward stroke of the piston will force all the liquid contained in the piston chambers upwardly through the two piston rods 34 and the pump rod .15 to the surface. The locking means which is automatically expanded outwardly to secure this deep well pump firmly to the sides of the casing is an important feature thereof as ordinary experience encounters great difficulty in securing the pump within the casing in such manner as to prevent vibration of the parts. Such a vibration of parts often may become serious and cause damage to the casing and also prevent the proper action of the pump itself. It will be obvious that the simple rotation of the pipe when the pump has been introduced into the well will cause the outward ex pansion of the gripping jaws so as to secure the same firmly in the well.

Furthermore when it is desired to withdraw the pump from the w'ell, as is frequently necessary in pumps for use in oil wells, etc., a few reverse turns of the pump rod will effect a positive release of the clamping jaws and allow the pump to be withdrawn without difiiculty.

Further advantages of my invention will be apparent without particular description.

What I claim as new and desire to protect by Letters Patent is;

1, In a pump, the combination of a hollow pump rod, a hollow piston head attached thereto, four piston rods upon said piston head, two of said rods being hollow,

a cylinderhaving four chambers in which the four piston rods reciprocate, valves in the two hollow piston rods, a valve chamber below said piston chamber and an upwardly opening valve in said valve chamber.

2. In a pump, the combination of a compound piston comprising a piston head having a central passage therethrough, a plurality of piston rods attached to the lower end of said head, certain of said rods being hollow, upwardly opening valves in said hollow piston' rods, a cylinder having a plurality of piston chambers therein, a valve chamber below said piston chambers and locking means operated by said pump rod 3. In a pump, the combination of a piston head, a fluid passaage therethrough, two

hollow piston rods on said piston head connecting with said fluid passage, two solid piston rods of smaller diameter than said.

hollow piston rods on saidhead, valves in said hollow rods and a separate chamber for each piston, said chambers opening into a valve chamber therebelow;

In testimony whereof, I hereunto afiix my signature this the 30th day of-September, A. D. 1918.

GRANVILLE ALLISON HUMASON. 

